Automatic stopping of looms



Filed May 1, 1945 z 0 July 9, 1946.

. M 6 mm a m m A yZczZ ywww ,4 f 7M a F d 1 I I I n i I I I i I l I l tI i I I l 1 l I u I I 1 I I I 0 LOU- Patented July 9, 1946 AUTOMATICSTOPPING OF LOOMS Richard Edwin Bridge, South Harrow, EnglandApplication May 1, 1945, Serial No. 591,345 In Great Britain March 20,1945 4 Claims. 1

This invention relates to means for the automatic stopping of a loomcomprising a shuttle provided with a hook-like member which, when owingto some fault the shed is not formed, is projected automatically intothe path of the ballooning weft thread, so as to cause the latter tobreak and bring about automatic stoppage of the loom in a known manner.The hook-like member of such means may be controlled by a pair ofpivotally mounted tripping pieces, having oppositely inclined faces, andengaging one another on a plane between their pivotal axes, one of saidtripping pieces being spring influenced and having in one therewith aspring influenced latch piece which, normally, extends across the pathof the lever by which the hooklike member is carried, said hook-likemember being itself influenced by a spring tending to project it intothe path of the ballooning weft thread, the arrangement being such that,when ,a perfect shed is not formed, the path of the inclined face of theone or the other of the tripping pieces is intersected by the warp ortwist threads, whereupon both tripping pieces are turned about theirpivot (owing to their engagement with one another), the latch piece iscaused to turn about the pivotal axis of the tripping piece to which itappertains and is displaced laterally with respect to the lever by whichthe hook-like member is carried thus releasing said lever to the actionof its spring to project the hook-like member into the path of theballooning weft thread.

One form of the invention is shown by accompanying drawing, in whichFigure 1 is a plan of a shuttle; Figure 2 is an enlarged fragmentarysectional elevation substantially on the line 2-2, Figure 3, and Figure3 is an enlarged fragmentary sectional elevation substantially on theline 3-3, Figure 2, the parts being shown in their set or normalpositions; Figures 4 and 5 are sectional elevations corresponding withFigures 2 and 3, respectively, but show the parts in their operative orabnormal positions; Figures 6 and 7 are sectional plans on the lines8-6, Figure 3, and 1-1, Figure 2, respectively.

The improved device involves only the drilling of a hole in the backside of a shuttle S, and it comprises a tube a in which is fitted a bodyb slotted to receive the movable parts as set forth hereinafter. Thebody b is formed at its lower end with a diametrai tongue which isreceived in a corresponding slot in the plugged lower end d of the tubea, the parts being retained in position by a cross pin e. The body I) isslotted diametrally at f, Figures 3 and 7, to accommodate a lever gpivoted on a pin h, the lever a being formed with a double-hook-likepart i and being influenced by a spring k tending to urge thedouble-hook-like part 7' through a slot m, Figures 2 and 7, in the tubea, while at its upper part the lever g is formed with a head 1.

At its upper end the body b is slotted diametrally at 0, Figures 1, 2and 6, at right angles to the general plane of the slot f and in thisslot 0 are pivoted on pins 11 17 two overlapping tripping ieces q r,from one (I, of which a pin 8 projects into a slotted eye t formed inthe other r.

Integral with the tripping piece q is an arm or latch piece u, urged bya spring 0 so that, normally, it intersects the path of the head 11 ofthe lever g and thereby holds said lever in its set position, as shownespecially in Figures 2 and 3. w is a sleeve on a cross pin a serving asa stop for limiting the outward movement of the lever 9 and itsdouble-hook-like part 1.

Each of the tripping pieces 9 1 is formed with an inclined face yprojecting slightly from the top end of the tube a which is bevelled asat z, Figures 2 and 4, to conform with the shape of the adjacent part ofthe shuttle 8.

During normal weaving the upper shed of the warp is raised to theposition indicated by the line H, Figure 2, in relation to the shuttleS, while under the effect of centrifugal force, the weft balloons insaid shuttle as indicated by the circular series of dots l2 whichrepresent a transverse action of the weft in successive positions. If,during weaving, the twist floats, i. e. a shed is not formed perfectly,even by the breaking of a single warp thread, a bunch of warp threads ispulled down to the position ll Figure 4, and engages the one or theother of the inclined faces 31, causing both of the tripping pieces q rand the latch piece it to be moved to the position shown in Figures 4and 5. This movement of the latch piece u releases the lever g to theaction of its spring k and the doublehook-like part 7 is projectedthrough the slot m into the path of the ballooning weft thread (asindicated in Figure 5) which is thus broken and brings about thestopping of the loom in a known manner.

After the necessary repair has been effected, the parts may be re-set bypressing back the double-hook-like part 7' through the slot m, whereuponthe spring 1; moves back the latch piece u into the path of said part toretain it in its set position.

The use of the safety device of this invention 3 involves only thedrilling of a hole in the back side of a shuttle and it follows that itmay be incorporated readily into existing shuttles as well as during themanufacture of new shuttles.

I claim:

1. For fitting into a bore in the side of a shuttle for the purpose ofeffecting the automatic stopping of a loom, a tubular casing, ahook-like member pivotally mounted in said casing, a spring tending tourge said hook-like member to project through a slot in said casing, aspring influenced latch piece, normally extending across said hook-likemember and holding it against the action of its spring, a pair ofinterconnected tripping pieces pivotally mounted in said casing andprojecting beyond one end thereof, said latch piece being connected withone of said tripping pieces and being movable therewith when saidtripping piece is moved about its pivot.

2. For fitting into a bore in the side of a shuttle for the purpose ofefiecting the automatic stopping of a loom, a tubular casing, ahook-like member pivotally mounted in said casing, a spring tending tourge said hook-like member to project through a slot in said casing, aspring influenced latch piece, normally extending across said hook-likemember and holding it against the action of its spring, a pair ofinterconnecting tripping pieces pivotally mounted in said casing andprojecting beyond one end thereof, said latch piece being connected withone of said 3. Means for the automatic stopping of a loom comprising ashuttle provided with a hook-like member which, when owing to some faultthe shed is not formed, is projected automatically into the path of theballooning weft thread, so as to cause the latter to break and bringabout automatic stoppage of the loom in a known manner, a springinfluenced latch piece, a pair of pivotally mounted tripping pieces,said latch piece being in one with one of said tripping pieces and saidtripping pieces having oppositely inclined faces and engaging oneanother on a plane between their pivotal axes, the hook-like memberbeing spring influenced and, normally, held in an inoperative positionby the spring influenced latch piece which is in one with one of thepair of pivotally mounted tripping pieces, the arrangement being suchthat, when a perfect shed is not formed, the path of the inclined faceof the one or the other of the tripping pieces is intersected by thewarp or twist threads, whereupon both tripping pieces are turned abouttheir pivots, the latch piece is caused to turn about its pivotal axiswith respect to the hook-like member, thus releasing said member to theaction of its spring and projecting its hook-like end into the path ofthe ballooning weft thread.

4. For fitting into a bore in the side of a shuttle for the purpose ofeffecting the automatic stopping of a loom, a tubular casing in whichare pivotally mounted a spring influenced hook-like member, a pair ofinterconnected tripping pieces and a spring influenced latch piece, thehook-like member being normally held in a set position by the springinfluenced latch piece, which is movable with one of said trippingpieces.

RICHARD EDWIN BRIDGE.

